Cap for writing instrument



FIG. 1 is a front view of a cap for writing instrument according to this design;

FIG. 2 is a left side view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a plan view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a perspective view thereof;

FIG. 7 is a vertical section along line 7--7 of FIG. 2;

FIG. 8 is a cross section along line 8--8 of FIG. 1; and,

FIG. 9 is a cross section along line 9--9 of FIG. 1. 

The ornamental design for a cap for writing instrument, as shown and described. 